but·ton·bushAHD[bŭtʹn-b‹sh'] D.J.[ˈbʌtnˌbʊʃ]K.K.[ˈbʌtņˌbʊʃ]n.(名词)buttonbushCephalanthus occidentalis
A deciduous North American shrub(Cephalanthus occidentalis) having opposite leaves and spherical clusters of small white flowers. 风箱树:生于北美的一种落叶灌木(风箱树风箱属), 有对生叶和由小白花构成的球状花簇